Pump for mixing oil and air



March 18,1930. J. R. KINNEY u PUMP FOR MIXING- OIL AND A'I-R Maflch 1851930- 'J. R. KINNEY y 1,751,006

l l PUMP FOR MIXING rOII'IAND AIR I Filed sept. 28,1192@ s sheets-sheet s 70w l y gl l I- v l I March' 1.8,-1930 J, R, I KlNNEY 1,751,006

A PUK? Fon MIXING oIL .um AIR Filed Sept. 28, 1928 5 Sheets-Sheet 4 Egf.

I JLLSLLSLJQ'RREH, -v

Marh 18, 1930. l .1.4 RQ KlNN-EY 1,751,006 PUMP FOR MIXING OIL AND un Filed sgpnzs, 192% 5' sheets-sh'eei 5 Inventor: JwsZuJJLKzms-y,

Patented Mar. 18, 193@ sraras JUSTU'S E. KIITI'NEY, OF JAMAICA PLAIN, MASSACHUSETTS, ASSIGiNOR TO lKINNEY MANUFACTURING COMPANY, F BOSTON, MASSACHUSETTS PUMP Fon MIXING on. AND AIR Application led September 28, 1928. Serial No. 308,930.

This invention relates to pumps for mixing oil and air and is particularly adapted to provide the proper mixture of these elements preparatory to ejecting the mixture into an oil burner.

The object of the invention is to provide a pump of comparatively simple construction connected with an oil tank in such a manner that the oil in the tank may be mixed 1U with air under compression, the surplus oil not required being returned to said tank.

This object is attained by the mechanism illustrated in the accompanying drawings.V

For the purpose of illustrating the invention, one preferred form thereof is illustrated in the drawings, this form having beenlfound to give satisfactory and reliable results, although it is to be understood that thevarious instrumentalities of which the invention consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described except as required' by the scope of the appended claims.

0f the drawings: Figure 1 represents a vertical section of a pump 4embodying the principles 4of the present invention, the cutting plane beingon line 1, 1, on Fig. 2.

Figure 2 represents a transverse vertical section of same on line 2, 2, on Fig. 1.

Figure 3 represents a vertical section of same on line 3, 3, on Fig. 2. I

'Figure 4 represents an elevation of same shown partly in section on line 4, 4, on Fig. l. v Figure 5 represents a horizontal section o same on line 5, 5, on Fig. 1, and- Figure 6 represents in diagram the connec- 49 tions of said pump with the main oil supply tank.

' Similar characters indicate like .parts throughout the several figures of the draw- 1n s.

n the drawings, 10 is the casing of anair pump having flanges 11 extending therefrom and adapted to be secured to a support 'therefor.

of the-.easing 10 is a'sump or reservoir 12.

Projecting downwardly from the bottom This sump has an opening 13 in the bottom thereof closed by a plate 14 retained in position by a bolt 15 threaded to a boss 16 projecting downwardly from thebottom of said casing.

The'casing 10 has two cylindricalchambers 17 formed therein in each ofwhich is an annular piston 18 mounted upon an eccentric. 19 secured to and rotatable with a shaft'20.

The eccentrics 19 are oppositely disposed on said shaft 2O and keyed thereto.

Each annular piston 18 has a radial blade 21 extending therefrom through a slot in an oscillating member 22, both oscillating members 22 being mounted in a bearing 23 formed in said casing 10. Y

The blade 21 has a passage 24 extending from vits outer end to one side face thereof as indicated in Fig. 1 of the drawings.

The outer end of this passage 24 communicates witha chamber 25 formed in the casing l0.

Secured to one end lof the casing 10 by bolts 26. is the casing 27 of an oil pump having a cover plate 28 at its outer end as shown in Fig.l 4,` of the drawings.

From one side -of the oil pump 27 extends a pipe 29 to the main'supply tank 30 from the bottom of which oil is drawn through the pipe 29 into the pump 27 whenthe latter is operating.

From the top of the oilpump 27 extends a pipe 31 to a relief valve 32 in communication withv the supply tank 30 by means of a pipe 33. The pipe 31 takes care of any surplus oil and gas in the pump and overflows through the relief valve 32 into the tank 30.' l 1 The reliefvalve may be adjusted to open at any predetermined pressure. i Within the chamber34'formed in-theoil pump 27 is a gear 35 keyed to the shaft 20 and rotatable therewith, .the outer ends of Athe teeth of said 'gear contacting with the cylindrical wall of said chamber. t

The teeth of this gear 35'mesh with the teeth of a pinion 36 keyed to a shaft 37,r one end of which extends through the cover plate 38 of the casing 10.

The outer ends of the teeth of the pinio 36 contact with the cylindrical wall of the 'cavity 36x in'which said pinion is mounted.

movement to the shaft 2O and drives the eccentrics 19-secured to said shaft 20.v

Itis obvious, therefore, that the drive shaft 37 actuates simultaneously both the oil pump and the air pump. i

During the rotation of the gear "35 and pinion 36 the oil is drawn through the Lpipe 29 and carried bythe teeth of said `gear and pinion in thedirection ofthe arrows a and' b and discharged linto'afpassage 39 leading to" this chamber 40 whilethe oil mixed with air or gas-developed -in the oil pumpand piping will remain at the top of said chamber from which it is carried oi through the pipe 31 to the tank 30.

in the air pump.'

vcommunicates with a vertical passage 43 the outer-.endet the boss 50 so that' said l.valve "50 The lower end of the chamber 40 communi- 'cates with one end of an inclined passage 41, the opposite end of which communicates with one end of a horizontal passage 42 while the opposite end of the horizontal passage 42 closed at its upper end by a threaded plug 44.

The upper endofthe passage 43 opens into a compartment 45 one end of which communicates-throu h a perforated tube 46 wit-hin theair inlet 4 leading'to the chamber' 25 The admission .ofi-oil to the tube 46 from .the'compartment 45 may be variedrby means of the valve 48j. v This valve, 48 may be of any well known construction but as shown in the drawings is threaded at 49 to :a boss 50 projectingfroin the casing 10. 1 'When the valve 48 has been properly ade' justed to admit the required amount of-'oil to the air pump a plug 51 isins'erted intocan'not be tampered with. j

AThe tube 46 extendslacrossu 47 and has perforati'ns 7 in the 'under' side l, thereof through whichoil .mayppass down,V

wardly through the inlet 47 into-the piston chambers 17. f 7 1" The shaft 37 extends 'through aiprojction g 53-therein- `forming a bearing fori., said shaft 37. Near the outer vend of th'effprojection 5 2' and secured to the shaft 37 adjacent the cover-.1:- plate 38-is an oil -slinger V 54 4 rotatable,withsaidshaft 37. j- '.2 ;L;-jj j; This oil'slin'ger 54 causes 'the oil within the. projection 52 to be thrown-toward the- 57 and forcing oil burner.

inner end of thevshaft 37-int`o the chambers 55 and 56 from which it is adapted to drain through thepassages 57 closed at their outer vwardly around the shaft 37.

A Oppositeltheqin'ner ends of" the drains 57 vare grooves' 59 -ormedin the eri heries of the oscillating 'members -22 so t at uringthe oscillation-of these members 22 the oil may atcertain'times drain from the chambers .55, I56'in'to the :chambers 17.",:f1`

These. grooves 59 are closed`at"thei`r"lower '-,l rotation ofthe "pisth'SQ13these closed ends will cut oiizany communication withxthedrains 57 and prevent. any 'pressure' generated inthe air pump `from entering these-drains the oil upwardly into the chambers 55,56'. .f

Any surplus oil in `the chambers- 17 may drain therefrom through the small openingsv A the upper end of an oil separating chamber "ends as indicated i'r 1 l1`igv 1 and during the y 40v in the upper part of the pump 27.

60 at the bottom of' saidchambers into the sump or reservoir.' 12 when not in. operation. l.

From the lower end of this sumpor reservoir 12 extends a vent pi e 61 to the suction inlet 47, as indicated in ig. 1,;a`n' d 'the'p'resf the air pump is sure on the dischargeside of pump extending v throughthe pipe 71 will -orce oil from Athe i sump 12 through this pipe 61 into'the inlet 47 fromjwhichitwill pass into theV crambers 17: i 1' y The lower end of this pipe 61'is' provi-ded -1 with a smallperforations 62 which limits the?` amountlof oil which may enter said pipe 61' at a given time and also the speed thereof.,-

Each4 piston rchamber' 17 communicates with an outlet chamber 63 from which extends a vertical passage 64 leading the pipe 65 `through which the oil mixediwith-thereg air may bejdelilvered to the quiredamount of This passage alsofcommiihicates with hhs-entrance to this tube" varied by means of valve 67-which is threaded at'68 'to a boss 69 extending from-thercasing 10.

When' theY valve 67 has beenproperlyf/d* ustedthe vouter end of the.boss. 6 9 is closedgby vplug Oto` prevent tampering '52 on the casing 10, this projection having a .67.l l' -i bushin f 'iiniystplust an visagie-ma (riquadah. as vaiva From the chamber 63 extends a pipe 71 to the upper end of the sump or reservoir 12, all as shown in Fig. 1 of the drawings.

Any oil from the air pump which cannot be taken. care of through the pipe 65 or tube 66 will drain into the sump 12 and create a pressure therein which will force out from the bottom of the sump into the pipe 61.

The opposite ends of the shaft 2O are reduced in diameter as indicated at 72 andconlined within bearings 7 3 formed in the cover plates 28 and 38.

During the rotation of the eccentric's 19 in the direction of the arrow c on Fig. 1 of the drawings, the passage 24 will be uncovered during a portion of the cycle of said eccentric,

thereby creating suction which will draw air through the air inlet 47.

As the oil tube 46 extends transversely of the air inlet 47 and has perforations in the lower wall thereof, the suction created in the air inlet 47 will draw the oilthrough these perforations and become thoroughly mixed therewith before they enter the chamber 25 and subsequently enter the piston chamber 17 through the passage 24. A

Inlike manner, the surplus air which enters the tube 66 extending transversely of the air inlet 47 will be drawn downwardly by suction through the pertorations in the tube 66 and will enter thechamber 25 and subsequently the piston chambers 17 through the passages 24.

The greater the quantity of air thus ad-L mitted to the chambers 17, the less quantity of fresh air will be required to be drawn through the inlet 47 from the outside of the casing.. l v

As the pistons 18 rotate in'their respective chambers 17 with one portion of these pistons always in contact with theI cylindrical wall thereof, the oil and air within these chambers will be thoroughly mixed before they enter the outlet chamber 63 and move through the passage 64 to the discharge pipe 65 which leads t0 the oil burner.

It is essential that there should always bea proper'l mixture of air and oil when delivered to the oil burner and the proper mixture may be attained by the adjustment of the valve 48.

In the operation of the invention the rotation of the gear 35 and pinion 36 will create a .l ered into the passage 39.

From this passage 39 the oil will be delivered into the top of the separating chamber 40 in which the undiluted oil will pass to the bottom of said chamber leaving the oil mixed with gas or air at the top thereof.

The lower end of this chamber communicates through the passages 41, 42, 43 with the compartment 45 from whichthe undiluted oil is delivered to .the -perforated tube 46 extending across the air inlet 47.

When the air pump is in operation the suction created in this inlet will draw the undiluted oilthrough the perforat-ions in the tube 46 and draw this oil mixed with fresh air into the pison chambers 17.

The surplus oil mixed with any air or gas which may have developed in the pump will return tothe tank 30 through the pipe 3l- -air being admitted at the same time thereto through the air inlet 47.

The amountof surplus air admittedfin this "manner may be regulated bythe adjustment of the-valve 68.

There is always air under pressure passing from the outlet 63 through the pipe 71 into the sump 12, thus causing an air pressure on the oil in the sump which forces said oiP from 'said sump into the pipe 61.

This oil passing from the sump through the pipe 61 will be discharged transversely of the air inlet 47 where it will become thoroughly mixed with the air being sucked through the air inlet 47 prior lto its admission to the piston chamber 17 During a portion of the cycle of the pistons 18, any oil entering the chambers 55 and 56 will be drained therefrom through the pasages 57 and enter the piston chambers 17,- thus dispensing with the necessity of any stuiiing shaft 37. Y f

This makes a very effective means for accurately 'mixing the correct proportions of air and oil to be used in an oil burner.

It is believed that the operation and many advantages of ythe invention will be understood without further description.

Having thus described my. invention, I claim:

1. The combination of a tank adapted to contain oil; a combined oil pump and air box aroundvthe outer end of the pump; a pipe leading from the oil tank .to

said oil pump; a return pipe from the oil pump tothe tank; means for discharging oil from the oil pump into the air pump; an outlet from the air pump; a by-pass from said outlet to the air pump inlet consisting in part of a tube extending across saidv inlet having perforations in the under wall thereber to said tank.

. tube extending 4across saidair/pump inlet and oil separating chamber formed in said casing above 1n said oil pump; means for delivering oil to the top of said chamber; means for deliveringl undiluated oil from the bottom of said chamber to the air pump inlet; and a pipe leading from the top of said cham- 3. The. combination of a tank adapted to contain oil; a combined oil pump .and air pump; a pipe leading from the oil tank to said oil pump; an oi'l separating chamber in said oil pump; means for delivering oil to the top of saidchamber; means for delivering undiluted oil from the bottom of said chamber to the air pump inlet consist- 7. The combination of a'tank adapted to contain oil; a casing; an oil pump within said casing; an air pump valso .within said casing and having a cylindrical piston chamber; a piston in said chamber contacting at one point with the cylindrical wall of said chamber; a pipe leading from the oil tank to said oil pump; a return pipe from the oil pump to the tank; means within said casing whereby the oil from the oil pump fmay be discharged into the inlet of said air pump; a

y discharge pipe from the air pump; a gear 1nl said oil pump; a, pinion meshing therewith; a driving shaft on which said pinion is mounted, said shaftbeing surrounded by an annular space; an oil slinger on Asaid shaft adapted to throw oil into-said space and prevent its escapethrough said casing; means permitting the oil in said annular space -to' drain into said piston chamber during a portion of the cycle of said piston; and a shaft ing in part of 4a tube extending across said` to which said-.piston and gear are both sejcontain oil; a combined oil# pump and air pump; a pipe leading from the oil tank to said oil pump; ,an oil separating chamber in said oilpump; means for delivering oil to the top of said chamber; 'means for 'delivering oil .fromthe bottom of said chamber to the air'pump inlet'consisting in part of a havingxperforations in the bottom thereof.; a valve' for regulating the. admission of oil to said tube, said valve being confined within a tubular boss on the air ump casing; a closure for the 'outer end ci) said boss; and a pipe leading from the top of said chamber tosaid' tank. "l l 5. The combination of a tank adapted to containA oil; a combined oil pump andair pump; a pipe leading from the oiltank to said oil pump; a return ipe from the oil' ump to the tank; means or-discharging oil om the oill ump into the air pump; an

outlet from t e'a1r pump; a sump below said air pump; a pipe leading to the top of the sump from the air pump outlet; and a vent pipefrom the bottom of the airpump inlet.

6. The 'combfnation of a' tank adapted to said sump to 'contain oil; a combinedloil pump and air pump; a 'pi-pe, le z a.diI1g- -rom the oil tank to saidoil pump; a return pipe from the oil pum j@ tha.. tank; f means for `discharging fronpithe .air pump outlet; a vent the-bottom' of-said sumpto the pipe , air'pump inletand a small orifice between said'sump and thepiston chamber of said air cured.

8.' The combination ofl a casing; anl oil pump within said casing; an air pump also within said casing; an oil separating chamber in the casing of said oil pump; means for delivering oil to the top of said chamber; means for delivering undiluted oil fromthe bottom .of said chamber to the air pump' i* ing from thetop of sald chamber for the discharge of a mixture of air and oil; a disv charge pipe from the outlet of said air pump; and means for discharging into'the air inlet of. the air pump all surplus mixture of gasv and oil in--said lair pump outlet.

10; The combination'of an oil pump; an vair pump; al sump below said air pump; an air inletl to said air pump; a pipe from the pressure side of said air pump to the top of said sump; an oil separating chamber in said 9. The combination of an Oil pump.;- anl oil pump; lmeans for delivering oil to the` top of said chamber; means for delivering.

k undiluted oil from the bottom of said chamber to the; air pump inlet; means for deliver- -mixed with gas discharged from the -air pump; andmeans for delivering oil from :saidsump to said 'air pumpinlet.' l

11. The combination of an oil. pump; an air pump having an air inlet; means for de- -livering oil .from said voil pump vto said air inlet; -a sump below said air pump means for delivering oil under pressure from said 4sump to said air inlet; an outlet from said ing finto theair ,pumpv inlet all surplus oil air pump; and means for discharging all surplus mixture of oil and gas from said outlet into said air inlet.

- Signed by me at 294 Washington St., Boston, Massachusetts, this 25th day ofvSeptember, 192s.

JUSTUS R. KINNEY. 

